Norton antivirus installation issues can lead to significant computer problems, including failure to appear in the add/remove programs list. Users experiencing similar issues may consider alternative antivirus solutions like Avast, which is noted for detecting viruses that Norton may miss. For troubleshooting, programs like Starter can help identify and manage startup items, while registry cleaners can assist in fixing related issues. Personal knowledge about computer operations and safe browsing practices is emphasized as crucial for avoiding viruses. Users are advised to disable unnecessary services and be cautious with email attachments. In cases of persistent issues with Norton, contacting Symantec for guided uninstallation and reinstallation, including registry cleanup, may resolve the problem.